@misc{indiciaec81109f883ec,
  title = {The formation of reference systems in visual motion perception.},
  author = {K T Kalveram and M Ritter},
  year = {1979},
  doi = {10.1007/bf00309419},
  url = {https://pubmed.ncbi.nlm.nih.gov/531136/},
  note = {Source identifier: 531136}
}